Fig. 3: Variation in the TMI threshold of a few-mode fiber oscillator associated with the change of the bending radius. | Light: Science & Applications

Fig. 3: Variation in the TMI threshold of a few-mode fiber oscillator associated with the change of the bending radius.

From: Transverse mode coupling in monolithic few-mode fiber laser oscillators

Fig. 3

Throughout the initial stage and a considerable portion of the second stage, coupling between LP01 and LP11 is predominant (indicated by the red region). Once the portion of LP11 exceeds 30%, the stronger coupling would occur between LP11 and LP21 (highlighted by the purple region)

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